Filter Kit Package Includes:6221372600 Air/Oil Separator*1 PCS,6211472500 Oil Filter*1 PCS, 6211473700 Air Filter*1 PCS Replacement Filter Kit Part Number:Air/Oil Separator 6221372600=6221372650,Oil Filter 6211472500=6211472600,Air Filter 6211473700=6211473750 The filter has been tested and meets the original manufacturing standards, reducing the maintenance cost of the air compressor Depending on the Working Condition of The Machine, it is Recommended that the Filter Kit Should be used for 2500-3000 thousand Hours. Air Compressor Filter Kit 6221372600 Oil Separator 6211472500 OIil Filter 6211473700 Air Filter